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clang-p2996/llvm/test/CodeGen/PowerPC/fma-combine.ll
Stefan Pintilie 53c37f300d [PowerPC] Add phony subregisters to cover the high half of the VSX registers. (#94628) 
On PowerPC there are 128 bit VSX registers. These registers are half
overlapped with 64 bit floating point registers (FPR). The 64 bit half
of the VXS register that does not overlap with the FPR does not overlap
with any other register class. The FPR are the only subregisters of the
VSX registers but they do not fully cover the 128 bit super register.
This leads to incorrect lane masks being created.

This patch adds phony registers for the other half of the VSX registers
in order to fully cover them and to make sure that the lane masks are
not the same for the VSX and the floating point register.
2024-07-29 11:17:04 -04:00

344 lines
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=powerpc64le-unknown-linux-gnu -enable-no-signed-zeros-fp-math \
; RUN: -enable-unsafe-fp-math < %s | FileCheck -check-prefix=CHECK-FAST %s
; RUN: llc -mtriple=powerpc64le-unknown-linux-gnu -enable-no-signed-zeros-fp-math \
; RUN: -enable-unsafe-fp-math -mattr=-vsx < %s | FileCheck -check-prefix=CHECK-FAST-NOVSX %s
; RUN: llc -mtriple=powerpc64le-unknown-linux-gnu < %s | FileCheck %s
define dso_local double @fma_combine1(double %a, double %b, double %c) {
; CHECK-FAST-LABEL: fma_combine1:
; CHECK-FAST: # %bb.0: # %entry
; CHECK-FAST-NEXT: xsnmaddadp 1, 3, 2
; CHECK-FAST-NEXT: blr
;
; CHECK-FAST-NOVSX-LABEL: fma_combine1:
; CHECK-FAST-NOVSX: # %bb.0: # %entry
; CHECK-FAST-NOVSX-NEXT: fnmadd 1, 3, 2, 1
; CHECK-FAST-NOVSX-NEXT: blr
;
; CHECK-LABEL: fma_combine1:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: xsnegdp 0, 3
; CHECK-NEXT: xsmuldp 0, 0, 2
; CHECK-NEXT: xssubdp 1, 0, 1
; CHECK-NEXT: blr
entry:
%fneg1 = fneg double %c
%mul = fmul double %fneg1, %b
%add = fsub double %mul, %a
ret double %add
}
define dso_local double @fma_combine2(double %a, double %b, double %c) {
; CHECK-FAST-LABEL: fma_combine2:
; CHECK-FAST: # %bb.0: # %entry
; CHECK-FAST-NEXT: xsnmaddadp 1, 2, 3
; CHECK-FAST-NEXT: blr
;
; CHECK-FAST-NOVSX-LABEL: fma_combine2:
; CHECK-FAST-NOVSX: # %bb.0: # %entry
; CHECK-FAST-NOVSX-NEXT: fnmadd 1, 2, 3, 1
; CHECK-FAST-NOVSX-NEXT: blr
;
; CHECK-LABEL: fma_combine2:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: xsnegdp 0, 3
; CHECK-NEXT: xsmuldp 0, 2, 0
; CHECK-NEXT: xssubdp 1, 0, 1
; CHECK-NEXT: blr
entry:
%fneg1 = fneg double %c
%mul = fmul double %b, %fneg1
%add = fsub double %mul, %a
ret double %add
}
@v = common dso_local local_unnamed_addr global double 0.000000e+00, align 8
@z = common dso_local local_unnamed_addr global double 0.000000e+00, align 8
define dso_local double @fma_combine_two_uses(double %a, double %b, double %c) {
; CHECK-FAST-LABEL: fma_combine_two_uses:
; CHECK-FAST: # %bb.0: # %entry
; CHECK-FAST-NEXT: xsnegdp 0, 1
; CHECK-FAST-NEXT: addis 3, 2, v@toc@ha
; CHECK-FAST-NEXT: xsnmaddadp 1, 3, 2
; CHECK-FAST-NEXT: stfd 0, v@toc@l(3)
; CHECK-FAST-NEXT: xsnegdp 0, 3
; CHECK-FAST-NEXT: addis 3, 2, z@toc@ha
; CHECK-FAST-NEXT: stfd 0, z@toc@l(3)
; CHECK-FAST-NEXT: blr
;
; CHECK-FAST-NOVSX-LABEL: fma_combine_two_uses:
; CHECK-FAST-NOVSX: # %bb.0: # %entry
; CHECK-FAST-NOVSX-NEXT: fneg 0, 1
; CHECK-FAST-NOVSX-NEXT: addis 3, 2, v@toc@ha
; CHECK-FAST-NOVSX-NEXT: fnmadd 1, 3, 2, 1
; CHECK-FAST-NOVSX-NEXT: stfd 0, v@toc@l(3)
; CHECK-FAST-NOVSX-NEXT: fneg 0, 3
; CHECK-FAST-NOVSX-NEXT: addis 3, 2, z@toc@ha
; CHECK-FAST-NOVSX-NEXT: stfd 0, z@toc@l(3)
; CHECK-FAST-NOVSX-NEXT: blr
;
; CHECK-LABEL: fma_combine_two_uses:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: xsnegdp 0, 1
; CHECK-NEXT: addis 3, 2, v@toc@ha
; CHECK-NEXT: stfd 0, v@toc@l(3)
; CHECK-NEXT: xsnegdp 0, 3
; CHECK-NEXT: addis 3, 2, z@toc@ha
; CHECK-NEXT: stfd 0, z@toc@l(3)
; CHECK-NEXT: xsmuldp 0, 0, 2
; CHECK-NEXT: xssubdp 1, 0, 1
; CHECK-NEXT: blr
entry:
%fneg = fneg double %a
store double %fneg, ptr @v, align 8
%fneg1 = fneg double %c
store double %fneg1, ptr @z, align 8
%mul = fmul double %fneg1, %b
%add = fsub double %mul, %a
ret double %add
}
define dso_local double @fma_combine_one_use(double %a, double %b, double %c) {
; CHECK-FAST-LABEL: fma_combine_one_use:
; CHECK-FAST: # %bb.0: # %entry
; CHECK-FAST-NEXT: xsnegdp 0, 1
; CHECK-FAST-NEXT: xsnmaddadp 1, 3, 2
; CHECK-FAST-NEXT: addis 3, 2, v@toc@ha
; CHECK-FAST-NEXT: stfd 0, v@toc@l(3)
; CHECK-FAST-NEXT: blr
;
; CHECK-FAST-NOVSX-LABEL: fma_combine_one_use:
; CHECK-FAST-NOVSX: # %bb.0: # %entry
; CHECK-FAST-NOVSX-NEXT: fneg 0, 1
; CHECK-FAST-NOVSX-NEXT: fnmadd 1, 3, 2, 1
; CHECK-FAST-NOVSX-NEXT: addis 3, 2, v@toc@ha
; CHECK-FAST-NOVSX-NEXT: stfd 0, v@toc@l(3)
; CHECK-FAST-NOVSX-NEXT: blr
;
; CHECK-LABEL: fma_combine_one_use:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: xsnegdp 0, 1
; CHECK-NEXT: addis 3, 2, v@toc@ha
; CHECK-NEXT: stfd 0, v@toc@l(3)
; CHECK-NEXT: xsnegdp 0, 3
; CHECK-NEXT: xsmuldp 0, 0, 2
; CHECK-NEXT: xssubdp 1, 0, 1
; CHECK-NEXT: blr
entry:
%fneg = fneg double %a
store double %fneg, ptr @v, align 8
%fneg1 = fneg double %c
%mul = fmul double %fneg1, %b
%add = fsub double %mul, %a
ret double %add
}
define dso_local float @fma_combine_no_ice() {
; CHECK-FAST-LABEL: fma_combine_no_ice:
; CHECK-FAST: # %bb.0:
; CHECK-FAST-NEXT: vspltisw 2, 1
; CHECK-FAST-NEXT: addis 3, 2, .LCPI4_0@toc@ha
; CHECK-FAST-NEXT: xvcvsxwdp 3, 34
; CHECK-FAST-NEXT: lfs 0, .LCPI4_0@toc@l(3)
; CHECK-FAST-NEXT: lfs 2, 0(3)
; CHECK-FAST-NEXT: addis 3, 2, .LCPI4_1@toc@ha
; CHECK-FAST-NEXT: lfs 1, .LCPI4_1@toc@l(3)
; CHECK-FAST-NEXT: xsmaddasp 3, 2, 0
; CHECK-FAST-NEXT: xsmaddasp 1, 2, 3
; CHECK-FAST-NEXT: xsnmsubasp 1, 3, 2
; CHECK-FAST-NEXT: blr
;
; CHECK-FAST-NOVSX-LABEL: fma_combine_no_ice:
; CHECK-FAST-NOVSX: # %bb.0:
; CHECK-FAST-NOVSX-NEXT: lfs 0, 0(3)
; CHECK-FAST-NOVSX-NEXT: addis 3, 2, .LCPI4_0@toc@ha
; CHECK-FAST-NOVSX-NEXT: lfs 1, .LCPI4_0@toc@l(3)
; CHECK-FAST-NOVSX-NEXT: addis 3, 2, .LCPI4_1@toc@ha
; CHECK-FAST-NOVSX-NEXT: lfs 2, .LCPI4_1@toc@l(3)
; CHECK-FAST-NOVSX-NEXT: addis 3, 2, .LCPI4_2@toc@ha
; CHECK-FAST-NOVSX-NEXT: fmadds 1, 0, 2, 1
; CHECK-FAST-NOVSX-NEXT: lfs 2, .LCPI4_2@toc@l(3)
; CHECK-FAST-NOVSX-NEXT: fmadds 2, 0, 1, 2
; CHECK-FAST-NOVSX-NEXT: fnmsubs 1, 1, 0, 2
; CHECK-FAST-NOVSX-NEXT: blr
;
; CHECK-LABEL: fma_combine_no_ice:
; CHECK: # %bb.0:
; CHECK-NEXT: vspltisw 2, 1
; CHECK-NEXT: addis 3, 2, .LCPI4_0@toc@ha
; CHECK-NEXT: xvcvsxwdp 3, 34
; CHECK-NEXT: lfs 0, .LCPI4_0@toc@l(3)
; CHECK-NEXT: lfs 2, 0(3)
; CHECK-NEXT: addis 3, 2, .LCPI4_1@toc@ha
; CHECK-NEXT: lfs 1, .LCPI4_1@toc@l(3)
; CHECK-NEXT: fmr 4, 3
; CHECK-NEXT: xsmaddasp 3, 2, 0
; CHECK-NEXT: xsnmaddasp 4, 2, 0
; CHECK-NEXT: xsmaddasp 1, 2, 3
; CHECK-NEXT: xsmaddasp 1, 4, 2
; CHECK-NEXT: blr
%tmp = load float, ptr undef, align 4
%tmp2 = load float, ptr undef, align 4
%tmp3 = fmul contract reassoc float %tmp, 0x3FE372D780000000
%tmp4 = fadd contract reassoc float %tmp3, 1.000000e+00
%tmp5 = fmul contract reassoc float %tmp2, %tmp4
%tmp6 = load float, ptr undef, align 4
%tmp7 = load float, ptr undef, align 4
%tmp8 = fmul contract reassoc float %tmp7, 0x3FE372D780000000
%tmp9 = fsub contract reassoc nsz float -1.000000e+00, %tmp8
%tmp10 = fmul contract reassoc float %tmp9, %tmp6
%tmp11 = fadd contract reassoc float %tmp5, 5.000000e-01
%tmp12 = fadd contract reassoc float %tmp11, %tmp10
ret float %tmp12
}
; This would crash while trying getNegatedExpression().
define dso_local double @getNegatedExpression_crash(double %x, double %y) {
; CHECK-FAST-LABEL: getNegatedExpression_crash:
; CHECK-FAST: # %bb.0:
; CHECK-FAST-NEXT: vspltisw 2, -1
; CHECK-FAST-NEXT: addis 3, 2, .LCPI5_0@toc@ha
; CHECK-FAST-NEXT: xvcvsxwdp 4, 34
; CHECK-FAST-NEXT: lfs 3, .LCPI5_0@toc@l(3)
; CHECK-FAST-NEXT: xssubdp 0, 1, 4
; CHECK-FAST-NEXT: xsmaddadp 4, 1, 3
; CHECK-FAST-NEXT: xsmaddadp 0, 4, 2
; CHECK-FAST-NEXT: fmr 1, 0
; CHECK-FAST-NEXT: blr
;
; CHECK-FAST-NOVSX-LABEL: getNegatedExpression_crash:
; CHECK-FAST-NOVSX: # %bb.0:
; CHECK-FAST-NOVSX-NEXT: addis 3, 2, .LCPI5_0@toc@ha
; CHECK-FAST-NOVSX-NEXT: lfs 0, .LCPI5_0@toc@l(3)
; CHECK-FAST-NOVSX-NEXT: addis 3, 2, .LCPI5_1@toc@ha
; CHECK-FAST-NOVSX-NEXT: lfs 3, .LCPI5_1@toc@l(3)
; CHECK-FAST-NOVSX-NEXT: fmadd 3, 1, 3, 0
; CHECK-FAST-NOVSX-NEXT: fsub 0, 1, 0
; CHECK-FAST-NOVSX-NEXT: fmadd 1, 3, 2, 0
; CHECK-FAST-NOVSX-NEXT: blr
;
; CHECK-LABEL: getNegatedExpression_crash:
; CHECK: # %bb.0:
; CHECK-NEXT: vspltisw 2, -1
; CHECK-NEXT: addis 3, 2, .LCPI5_0@toc@ha
; CHECK-NEXT: xvcvsxwdp 4, 34
; CHECK-NEXT: lfs 3, .LCPI5_0@toc@l(3)
; CHECK-NEXT: xssubdp 0, 1, 4
; CHECK-NEXT: xsmaddadp 4, 1, 3
; CHECK-NEXT: xsmaddadp 0, 4, 2
; CHECK-NEXT: fmr 1, 0
; CHECK-NEXT: blr
%neg = fneg reassoc double %x
%fma = call reassoc nsz double @llvm.fma.f64(double %neg, double 42.0, double -1.0)
%add = fadd reassoc nsz double %x, 1.0
%fma1 = call reassoc nsz double @llvm.fma.f64(double %fma, double %y, double %add)
ret double %fma1
}
define dso_local double @fma_flag_propagation(double %a) {
; CHECK-FAST-LABEL: fma_flag_propagation:
; CHECK-FAST: # %bb.0: # %entry
; CHECK-FAST-NEXT: xxlxor 1, 1, 1
; CHECK-FAST-NEXT: blr
;
; CHECK-FAST-NOVSX-LABEL: fma_flag_propagation:
; CHECK-FAST-NOVSX: # %bb.0: # %entry
; CHECK-FAST-NOVSX-NEXT: addis 3, 2, .LCPI6_0@toc@ha
; CHECK-FAST-NOVSX-NEXT: lfs 1, .LCPI6_0@toc@l(3)
; CHECK-FAST-NOVSX-NEXT: blr
;
; CHECK-LABEL: fma_flag_propagation:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: xxlxor 1, 1, 1
; CHECK-NEXT: blr
entry:
%0 = fneg double %a
%1 = call reassoc nnan double @llvm.fma.f64(double %0, double 1.0, double %a)
ret double %1
}
define dso_local double @neg_fma_flag_propagation(double %a) {
; CHECK-FAST-LABEL: neg_fma_flag_propagation:
; CHECK-FAST: # %bb.0: # %entry
; CHECK-FAST-NEXT: xxlxor 1, 1, 1
; CHECK-FAST-NEXT: blr
;
; CHECK-FAST-NOVSX-LABEL: neg_fma_flag_propagation:
; CHECK-FAST-NOVSX: # %bb.0: # %entry
; CHECK-FAST-NOVSX-NEXT: addis 3, 2, .LCPI7_0@toc@ha
; CHECK-FAST-NOVSX-NEXT: lfs 1, .LCPI7_0@toc@l(3)
; CHECK-FAST-NOVSX-NEXT: blr
;
; CHECK-LABEL: neg_fma_flag_propagation:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: xxlxor 1, 1, 1
; CHECK-NEXT: blr
entry:
%0 = call reassoc nnan double @llvm.fma.f64(double %a, double -1.0, double %a)
ret double %0
}
define <2 x double> @vec_neg_fma_flag_propagation(<2 x double> %a) {
; CHECK-FAST-LABEL: vec_neg_fma_flag_propagation:
; CHECK-FAST: # %bb.0: # %entry
; CHECK-FAST-NEXT: addis 3, 2, .LCPI8_0@toc@ha
; CHECK-FAST-NEXT: addi 3, 3, .LCPI8_0@toc@l
; CHECK-FAST-NEXT: lxvd2x 0, 0, 3
; CHECK-FAST-NEXT: xvmaddadp 34, 34, 0
; CHECK-FAST-NEXT: blr
;
; CHECK-FAST-NOVSX-LABEL: vec_neg_fma_flag_propagation:
; CHECK-FAST-NOVSX: # %bb.0: # %entry
; CHECK-FAST-NOVSX-NEXT: addis 3, 2, .LCPI8_0@toc@ha
; CHECK-FAST-NOVSX-NEXT: lfs 1, .LCPI8_0@toc@l(3)
; CHECK-FAST-NOVSX-NEXT: fmr 2, 1
; CHECK-FAST-NOVSX-NEXT: blr
;
; CHECK-LABEL: vec_neg_fma_flag_propagation:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: addis 3, 2, .LCPI8_0@toc@ha
; CHECK-NEXT: addi 3, 3, .LCPI8_0@toc@l
; CHECK-NEXT: lxvd2x 0, 0, 3
; CHECK-NEXT: xvmaddadp 34, 34, 0
; CHECK-NEXT: blr
entry:
%0 = call reassoc nnan <2 x double> @llvm.fma.v2f64(<2 x double> %a, <2 x double> <double -1.0, double -1.0>, <2 x double> %a)
ret <2 x double> %0
}
define dso_local double @fma_combine_const(double %a, double %b) {
; CHECK-FAST-LABEL: fma_combine_const:
; CHECK-FAST: # %bb.0: # %entry
; CHECK-FAST-NEXT: addis 3, 2, .LCPI9_0@toc@ha
; CHECK-FAST-NEXT: lfd 0, .LCPI9_0@toc@l(3)
; CHECK-FAST-NEXT: xsmaddadp 2, 1, 0
; CHECK-FAST-NEXT: fmr 1, 2
; CHECK-FAST-NEXT: blr
;
; CHECK-FAST-NOVSX-LABEL: fma_combine_const:
; CHECK-FAST-NOVSX: # %bb.0: # %entry
; CHECK-FAST-NOVSX-NEXT: addis 3, 2, .LCPI9_0@toc@ha
; CHECK-FAST-NOVSX-NEXT: lfd 0, .LCPI9_0@toc@l(3)
; CHECK-FAST-NOVSX-NEXT: fmadd 1, 1, 0, 2
; CHECK-FAST-NOVSX-NEXT: blr
;
; CHECK-LABEL: fma_combine_const:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: addis 3, 2, .LCPI9_0@toc@ha
; CHECK-NEXT: lfd 0, .LCPI9_0@toc@l(3)
; CHECK-NEXT: addis 3, 2, .LCPI9_1@toc@ha
; CHECK-NEXT: xsmuldp 0, 1, 0
; CHECK-NEXT: lfd 1, .LCPI9_1@toc@l(3)
; CHECK-NEXT: xsmaddadp 2, 0, 1
; CHECK-NEXT: fmr 1, 2
; CHECK-NEXT: blr
entry:
%0 = fmul double %a, 1.1
%1 = call contract double @llvm.fma.f64(double %0, double 2.1, double %b)
ret double %1
}
declare double @llvm.fma.f64(double, double, double) nounwind readnone
declare <2 x double> @llvm.fma.v2f64(<2 x double>, <2 x double>, <2 x double>) nounwind readnone
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